Coevolution of host-parasites, Biology

Coevolutionary relationships between parasites and their hosts can be more complicated than between predators and their prey. As in the case of prey-predator relationship, one can expect hosts to evolve more effective defences against the parasite, and the parasite in turn can evolve to be more virulent. A balancing act has to be done here also as the parasite cannot afford to increase its own reproductive efficiency at the expense of the host. The death of the host would mean the death of the parasite before it could be transmitted to another living host. If the parasite has to be transferred from one host to another the parasite must evolve a lower degree of virulence so as not to kill the host. Successful host-parasite relationships are evolved on the dictum of "live and let live".

The well known Australian example illustrates the coevolution concept between rabbit hosts and myxorna virus parasite. European rabbits Oryctolagus cuniculus were first introduced into the Australian continent in the middle of the 19th century. In less than ten years the population multiplied into enormous numbers occupying a wide variety of environments in Australia from subalpine to subtropical zones. Towards the middle of the 19th century there were several hundred million rabbits. The rabbits had attained the status of a serious pest population. In order to control very effectively the population size, a search of natural enemies for the rabbits was made. Such a search reiealed that myxoma virus could multiply as an epizoite on rabbits and that mosquitoes could be the natural vectors for the mechanical transfer of the parasite.

Posted Date: 4/5/2013 6:19:15 AM | Location : United States







Related Discussions:- Coevolution of host-parasites, Assignment Help, Ask Question on Coevolution of host-parasites, Get Answer, Expert's Help, Coevolution of host-parasites Discussions

Write discussion on Coevolution of host-parasites
Your posts are moderated
Related Questions
What is the difference between alpha glucose and beta glucose? Why are they different?

What is prophylaxis? Prophylaxis are measures taken to stop diseases. For instance, the use of condoms in sexual relations is a prophylaxis against contamination by agents that

Limb Regeneration in Anuran Amphibians We are already aware that the limb of adult frogs does not regenerate later than amputation. Though, some regeneration has been found to

Segmentation - Metazoa Segmentation or metamerism is the division of the body into smaller transverse compartments along the anterior-posterior axis. Segmentation is widesprea

Explain Classification of Protein based on amino acid content? Nutritionally, amino acids are classified on the basis of the body's ability to synthesize them - as essential (i

The structure of moulds When the four pure cultures of mould have reached a vigorous state of growth study each one with a hand lens. See if you can see stalks with tiny black

What is complete transposition of arteries? Complete transposition of the great arteries (dTGA): The atria and ventricles are connected appropriately i.e., the right atrium dra

Q. What is the relation between fecundation and the end of the meiotic process during oogenesis? The oocyte II only completes the second meiotic division (interrupted at metaph

Q. Habitat for the worlds species? Natural ecosystems provide habitat for the world's species. Forests, coral reefs and deep ocean bottoms house many species. Wetlands, through

Metabolic Process Location Within the study of biochemistry, what tends to obtain lost amidst the numerous pathways and enzymes is the fact which metabolism concerns the overal